我如何删除mysql中的重复行，以保留已填充其他字段的行？

我有一个表格，格式如下：

姓名、电话、月份、年份

2018年1月22日

bbb uuuuuuuuuuu2222 uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu_____________

aaa uuuuuuuuuuu2222 uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu___________

在这里，我想检查重复的电话条目，并删除所有条目，除了填写月份和年份字段的条目

由于我对加入查询不是很在行，因此非常感谢您的帮助。。我发现了类似的问题，但用这个问题，我无法保留已填写其他文件的问题

如果有人能帮忙，请提前感谢。

为什么不这样做呢

delete t from table t
    where month is null and year is null;

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我发现最好的答案不是删除，而是移动到另一个表，速度更快，危险性更小，如下所示：

插入姓名（id、姓名、电话、月份、年份） 选择不同的id、姓名、电话、月份、年份 从表名开始

希望它能起作用

试试这个：

delete from table t
inner join 

(select name,Telephone ,row_number() over (partition by name,Telephone order by month,year ) RN
from table 
) temp 
on t.name = temp.name and 
   t.Telephone = temp.Telephone
where RN > 1 

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这个可能的重复可以和@Gordon LinoffI mean的另一个答案连接起来，带WHERE